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path: root/app/assets/javascripts/boards/components/modal/list.js.es6
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/* global Vue */
/* global ListIssue */
/* global Masonry */
(() => {
  let listMasonry;
  const ModalStore = gl.issueBoards.ModalStore;

  gl.issueBoards.ModalList = Vue.extend({
    props: {
      issueLinkBase: {
        type: String,
        required: true,
      },
      rootPath: {
        type: String,
        required: true,
      },
    },
    data() {
      return ModalStore.store;
    },
    watch: {
      activeTab() {
        this.initMasonry();

        if (this.activeTab === 'all') {
          ModalStore.purgeUnselectedIssues();
        }
      },
      issues: {
        handler() {
          this.initMasonry();
        },
        deep: true,
      },
    },
    computed: {
      loopIssues() {
        if (this.activeTab === 'all') {
          return this.issues;
        }

        return this.selectedIssues;
      },
    },
    methods: {
      toggleIssue(e, issue) {
        if (e.target.tagName !== 'A') {
          ModalStore.toggleIssue(issue);
        }
      },
      listHeight() {
        return this.$refs.list.getBoundingClientRect().height;
      },
      scrollHeight() {
        return this.$refs.list.scrollHeight;
      },
      scrollTop() {
        return this.$refs.list.scrollTop + this.listHeight();
      },
      showIssue(issue) {
        if (this.activeTab === 'all') return true;

        const index = ModalStore.selectedIssueIndex(issue);

        return index !== -1;
      },
      initMasonry() {
        const listScrollTop = this.$refs.list.scrollTop;

        this.$nextTick(() => {
          this.destroyMasonry();
          listMasonry = new Masonry(this.$refs.list, {
            transitionDuration: 0,
          });

          this.$refs.list.scrollTop = listScrollTop;
        });
      },
      destroyMasonry() {
        if (listMasonry) {
          listMasonry.destroy();
          listMasonry = undefined;
        }
      },
    },
    mounted() {
      this.initMasonry();

      this.$refs.list.onscroll = () => {
        const currentPage = Math.floor(this.issues.length / this.perPage);

        if ((this.scrollTop() > this.scrollHeight() - 100) && !this.loadingNewPage
          && currentPage === this.page) {
          this.loadingNewPage = true;
          this.page += 1;
        }
      };
    },
    destroyed() {
      this.destroyMasonry();
    },
    components: {
      'issue-card-inner': gl.issueBoards.IssueCardInner,
    },
    template: `
      <section
        class="add-issues-list add-issues-list-columns"
        ref="list">
        <div
          v-for="issue in loopIssues"
          v-if="showIssue(issue)"
          class="card-parent">
          <div
            class="card"
            :class="{ 'is-active': issue.selected }"
            @click="toggleIssue($event, issue)">
            <issue-card-inner
              :issue="issue"
              :issue-link-base="issueLinkBase"
              :root-path="rootPath">
            </issue-card-inner>
            <span
              :aria-label="'Issue #' + issue.id + ' selected'"
              aria-checked="true"
              v-if="issue.selected"
              class="issue-card-selected text-center">
              <i class="fa fa-check"></i>
            </span>
          </div>
        </div>
      </section>
    `,
  });
})();